package com.hu.uitl;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.File;

public class SendMail {
    private final Logger logger = LoggerFactory.getLogger(this.getClass());

    @Autowired
    private JavaMailSender mailSender;
    @Value("${mail.fromMail.addr}")//对应配置文件中
    private String from;

    /**
     * 发送简单邮件
     * @param to 目标邮箱
     * @param subject 标题
     * @param content 内容
     */
    public void sendSimpleMail(String to, String subject, String content) {
        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom(from);
        message.setTo(to);
        message.setSubject(subject);
        message.setText(content);
        try {
            mailSender.send(message);
            logger.info("简单邮件已经发送。");
        } catch (Exception e) {
            logger.error("发送简单邮件时发生异常！", e);
        }
    }

    /**
     * 发送html类型邮件
     * @param to
     * @param subject
     * @param content
     * 内容如：String content="<html><body><h3>hello world ! 这是一封Html邮件!</h3></body></html>";
     *
     * 或者使用模板引擎 在templates下创建emailTemplate.html,然后解析成String
     *  创建邮件正文
     *  Context context = new Context();
     *  context.setVariable("id", "006");
     *  String emailContent = templateEngine.process("emailTemplate", context);
     */
    public void sendHtmlMail(String to, String subject, String content) {
        MimeMessage message = mailSender.createMimeMessage();
        try {
            //true表示需要创建一个multipart message
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(from);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(content, true);
            mailSender.send(message);
            logger.info("html邮件发送成功");
        } catch (MessagingException e) {
            logger.error("发送html邮件时发生异常！", e);
        }
    }

    /**
     * 发送带附件的邮件
     * @param to
     * @param subject
     * @param content
     * @param filePath 文件的路径
     */
    public void sendAttachmentsMail(String to, String subject, String content, String filePath){
        MimeMessage message = mailSender.createMimeMessage();

        try {
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(from);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(content, true);

            FileSystemResource file = new FileSystemResource(new File(filePath));
            String fileName = filePath.substring(filePath.lastIndexOf(File.separator));
            helper.addAttachment(fileName, file);

            mailSender.send(message);
            logger.info("带附件的邮件已经发送。");
        } catch (MessagingException e) {
            logger.error("发送带附件的邮件时发生异常！", e);
        }
    }

    /**
     * 发送带静态资源的邮件，如图片
     * @param to
     * @param subject 主题
     * @param content
     * @param rscPath
     * @param rscId
     * 参数示例：
     * String rscId = "neo006";
     * String content="<html><body>这是有图片的邮件：<img src=\'cid:" + rscId + "\' ></body></html>";
     * String imgPath = "C:\\Users\\summer\\Pictures\\favicon.png";
     */
    public void sendInlineResourceMail(String to, String subject, String content, String rscPath, String rscId){
        MimeMessage message = mailSender.createMimeMessage();

        try {
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(from);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(content, true);

            FileSystemResource res = new FileSystemResource(new File(rscPath));
            helper.addInline(rscId, res);
            //多个图片使用多条<img src='cid:" + rscId + "' > 和 helper.addInline(rscId, res)

            mailSender.send(message);
            logger.info("嵌入静态资源的邮件已经发送。");
        } catch (MessagingException e) {
            logger.error("发送嵌入静态资源的邮件时发生异常！", e);
        }
    }

}
